Stove or furnace.



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STOVE on FURNAG'E.

(Application filed Jan. 27, 1902,)

, (No Model.)

WITNESSES.

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UNIT-EDSTATES PATENT GEORGE W. corn, OF DETROIT, MICHIGAN, ASSIGNOR TO J. W. VAN CLEAVE, I i 0117 s11. LOUIS, MISSOURI.

1 STOVE OR FURNACE.

SPECIFICATION forming part of Letters Patent N 0. 716,195, dated December 16, 1902. Application filed January 27, 1902 Serial No. 91,455. (No model.)

useful Improvements in Stoves or Furnaces,

of which the following is a specification, ref-' erence beinghad therein to the accompanying drawings.

The invention relates to stoves or furnaces of that type wherein heated air is introduced within the fire-pot to secure the combustion of the smoke and gases arising from the fuel for the purpose of increasingthe heating capacity of the furnace.

The present invention consists in the novel construction of a fire-pot adapted for use in burners of the type referred to, in the peculiar construction of devices for heating and admitting air within the fire-pot, and in the novel manner of combining the air-heating devices with the fire-pot, whereby the destruction of said devices by the intense heat to which they are necessarily subjected is obviated.

The invention further consists in other details of construction, as will be hereinafter described, and illustrated in the drawings, in which- 7 j Figure 1 is avertical central section through; a fire-pot embodying my invention. Fig. 2 isa horizontal sect-ion therethrough. I Fig. 3 is a section taken on line a: :20, Fig. 1.. Fig. 4 is a sectionon line y y of Fig. 1, and Fig. 5 is a sectional view of a modified construction of air-conduit.

In the drawings thus briefly described the reference-letter A designates the base-section of a stove or furnace, upon which is supportedthe fire-pot B, and 0 represents an air-supply conduit extending circumferentially of the fire-pot below its top and adapted, as will be hereinafter described, to admit heatedair along the sides of theburning fuel for'th'e purposes above set forth.

While it has beencustomary heretofore to employ an air-chamber about thefire-pot for feeding airwithin the interior of the latter,

considerabletrouble has been encountered in obtaining an economical construction of air-chamber, and still further difficulty has been experienced in combining the conduit with the fire-pot in such manner that it would not be destroyed by the heat to which it is.

necessarily exposed. It has also been found difficult to keep the air chamber or conduit and the passages. leading therefrom to the interior of the fire-pot free from the ashes and dust. In the present construction of fire-pot I have obviated these several defects in a novel and simple manner, as will be hereinafter set forth.

For the purpose of simplifying the construction of the fire-pot and reducing the cost of manufacture to a minimum I cast the air-conduit O integral with the fire-pot. A single casting may be made, if desired, which, however, would require the use of a core for the formation of the air-chamber. This requirement, which is objectionable, I dispense with by formingthe fire-pot in two sections and construct a sectional air-conduit the sections of which are carried integral with the fire-pot sections.

The reference-letters D and E designate the sections of the fire-pot which are superimposed, as indicated in the d rawings. Extend ing laterally and upwardly from the upper edge terminal of the lower section D is an annular flange F, which forms one of the sections of the air-conduit.

G designates a complementary section in the form of an annular flange extending outwardly and downwardly from the upper section E at a line considerably above the lower edge or terminal H of said section. The outer edges of the annular flanges are adapted to meet and abut, as plainly indicated in Fig. 3 of the drawings, and a tight joint is made between the parts, preferably by the use of cement.

The depending portion of the wall of the upper fire-pot section, which projects below the annular flange G and which I designate by the reference-letter I, constitutes the innor wall of the air-conduit and is directly exposed to the intenseheat ofthe burning fuel. This wall, however, being integral with the external wall of the upper fire-pot section, the heat is conveyed away by conduction from the inner wall of the conduit to the parts of the tire-pot wall that are exposed to the atmosphere. The overheating and consequent burning out of-the air-conduit is thus prevented, and one of the chief difficulties encountered in the construction of furnaces of this type is obviated in a simple and effective manner.

At the front of the stove or furnace the airsupply conduit 0 is provided with an inletopening J, which is controlled by a door or cover K, swiveled upon a hand-screw L, which in turn is threaded in a bar M, extending across the inlet-opening, as plainly indicated in Fig. 2.

I In order to introduce the air fromthe annular chamber or conduit along the sides of the burning fuel, I form in the upper fire-pot section a series of spaced vertical and circumferentially-arranged slots 0 and cover these slots by a corresponding series of similarlyarranged air-ductsP. Theseducts are formed integral with the upper section, are closed at their upper ends, and communicate at their lower ends with the circumferentially extending air-supply conduit G. Air entering the supply-conduit through its inlet-opening is heated to the requisite degree therein and passing upwardly through the series of airducts is discharged within the interior of the fire-pot through the slots in its upper section, and the desired combustion of the smoke and gases is effected. I

In order to prevent the slots in the fire-pot from being clogged with ashes, I preferably taper the inner wall of the upper fire-pot section insuch mannerthatitwillflareoutwardlyfrom its top to its bottom, as plainly shown in Fig. 1. The ashes and fuel are in this manner caused to fall away from the slotted portion of the fire-pot and any material clogging of the slots is prevented. For such slight amount of ash or dirt as may sift through the slots into the air-conduit I have provided a discharge-opening Q in the latter through which the ashes may be easily removed. This opening is at the bottom of the air-conduit and is formed by proportioning the sections in such manner as to leave a space between the lower edge of the hanging wall I and the lower section of the fire-pot.

In Fig. 5 the lower fire-potsection is shown as sloping outwardly at its upper edge, the,

angle at that point, as illustrated in the other figures, being eliminated. The sloping portion, as shown, is at such an inclination as will cause the ashes that alight upon it to fall immediately from the air-chamber.

From the description of my invention it will be readily seen that I have combined the required air-supply conduit with the fire-pot in a simple and efiective manner, and by forming the inner wall of the conduit integral with the external wall of the fire-pot, which is exposed to the atmosphere, I have guarded against the burning out of the airsupply devices.

What I claim as my invention is- 1. In a stove, the combination with a firepot made in two sections divided horizontally, a lower section provided with an outwardly-extending flange at its upper terminal, an upper section provided with a flange extending outwardly from a line above its lower terminal and with a wall dropping below the junction between the flange and the outer surface of said wall, whereby there is formed an annular air-space between the said flanges and said wall, the flange at the upper end of the lower section of said pot being formed with a slope to admit of the free discharge into the firepot of accumulations gathering in said air chamber, substantially as described.

2. In a stove or furnace, the combination with a fire-pot having a circumferentiallyarranged series of vertically-extending slots therein, the inner wall of the slotted portion t of said fire-pot flaring outwardly from the top to the bottom thereof, and a series of airducts arranged upon the exterior of the firepot directly over the slots therein and communicating through the slots with the interior of said fire-pot, and an air-supply conduit below the series of air-ducts into which the lower ends of the ducts lead, said airsupply conduit also being arranged outside of said slotted portion of the fire -.pot and communicating with the slots therein; substantially as and for the purpose described.

3. In a stove or furnace, a fire-pot provided with an air-supply conduit arranged circumferentially thereof and adapted to discharge air into the interior of the fire-pot, the lower end of said conduit being open and having an outer wall formed with a slope to facilitate the free discharge into the fire-pot of accumulations gathering in said air-conduit; substantially as described.

4. In a stove or furnace, a fire-pot made with an upper and lower section, the lower section being provided at its upper terminal with an outwardly-extending upwardly-sloping flange, the upper section being provided with a hanging wall having vertical slots therein and with an outwardlyextending downward-sloping flange arranged to engage with the flange of the lower section, the said hanging wall being inclined from its upper edge downwardly and outwardly to its lower edge and spaced from thelower section whereby there is provided an opening between the same and the upwardly-sloping flange of the lower section for the escape of material gathering behind said hanging wall; substantially as described.

5. In a stove of the character described, a fire-pot formed of two castings joined along a horizontal line, the castings adjacent to their meeting line being extended outwardly to form a circumferentially arranged airspace therebeneath, said upper casting being formed with a series of vertically-disposed airducts P communicating with said airspace, and a depending portion I constituting the inner wall of said air-space and the ducts, said wall being provided with openings l therewith an air-chamber, each air-duct bethrough which air may escape from the air space and ducts directly into the fire-pot; substantially as described.

6. In a-stove or furnace, a fire-pot formed of two superimposed sections having a sectional air-supply conduit extending therearound and a series of spaced circumferentially-arranged vertical air-conduits above the air-conduit and constituting therewith an air-chamber, the inner wall of said air-chamber being slotted whereby air may pass directly from the air conduit and ducts into the interior of the fire-pot; substantially as describedr 7. In a stove or furnace, a fire-pot formed of two superposed sections each having a lat orally-projecting flange extending around the fire-pot, the flanges abutting at their outer edges to form an air-conduit, and a series of spaced circumferentially arranged vertical air-ducts above the air-conduit and forming ing closed at its upper end, the inner wall of said air-chamber being slotted whereby air may pass directly from the air conduit and ducts into the interior of the fire-pot; substantially as described. i

8. In a stove or furnace, a fire-pot having an air-supply conduitextending therear'ound below its top and a series of spaced vertical air-ducts closed at their tops and circumferentially arranged above the air-conduit and forming with said air-conduit an air-chamber, the inner wall of said air-chamber being slotted whereby air may pass directly from the air conduit and ducts into the interior of the fire-pot; substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

GEORGE W. COPE. Witnesses: M. B. ODOGHERTY, H. 0. SMITH. 

